Horizontal jet-mechanical combined rock breaking test device and method

Patent metadata

Field	Value
Publication number	US-11630042-B2
Application number	US-202017642299-A
Country	US
Kind code	B2
Filing date	Jul 13, 2020
Priority date	Apr 20, 2020
Publication date	Apr 18, 2023
Grant date	Apr 18, 2023

Abstract

A horizontal jet-mechanical combined rock breaking test device and method. The device includes a horizontal base. One end of the horizontal base is provided with a multi-mode cutter head. A jet-mechanical combined cutter is provided on the multi-mode cutter head. The other end of the horizontal base is provided with a surrounding rock stress simulation bin for loading a rock sample. The multi-mode cutter head is connected to a driving mechanism, and the multi-mode cutter head is configured to advance and rotate horizontally along the horizontal base under the action of the driving mechanism, so that the jet-mechanical combined cutter is capable of acting on the rock sample.

First claim

What is claimed is:

1. A horizontal jet-mechanical combined rock breaking test device, comprising: a reaction frame, wherein on the reaction frame is provided a multi-mode cutter head, plural jet-mechanical combined cutters are provided on the multi-mode cutter head, and on one end of the reaction frame is provided with a surrounding rock stress simulation bin for loading a rock sample; and
the multi-mode cutter head is connected to a driving mechanism, and the multi-mode cutter head is configured to advance and rotate horizontally along the reaction frame under the action of the driving mechanism, so that the jet-mechanical combined cutters are capable of acting on the rock sample;
the multi-mode cutter head comprises a cutter head base, a high-pressure rotary joint, a diverter, the jet-mechanical combined cutter and a pipeline, wherein the jet-mechanical combined cutters are provided on one side of the cutter head base, the high-pressure rotary joint is provided on the other side of the cutter head base, the high-pressure rotary joint is connected to the diverter, and the diverter is connected to a jet nozzle in each jet-mechanical combined cutter through the pipeline;
the plural jet-mechanical combined cutters comprise a measuring component, the measuring component comprises a ranging sensor, and the ranging sensor is provided on a cutter rest to monitor a distance between a hob of the jet-mechanical combined cutter and a target object; and
each of the jet-mechanical combined cutters comprises a cutter holder, a mechanical cutter module and a jet cutter module are detachably provided on the cutter holder, and relative positions of the jet cutter module and the mechanical cutter module are adjustable.

2. The horizontal jet-mechanical combined rock breaking test device according to claim 1 , wherein each cutter holder is mounted on a mounting mechanism of the cutter head, a distance between cutter holders is adjusted through an adjusting mechanism, and a locking mechanism is provided on each cutter holder; and a sliding rail is provided on the cutter holder, a sliding block is movably connected on the sliding rail, a jet cutter module is provided on the sliding block, and a mechanical cutter module is provided in the middle of the cutter holder.

3. The horizontal jet-mechanical combined rock breaking test device according to claim 1 , wherein the jet cutter module comprises an adjustable support provided on the sliding block, a mechanical arm is rotatably provided on the adjustable support, a jet nozzle is provided on the mechanical arm, and the jet nozzle is capable of being connected to a hose connected to a jet liquid supply mechanism.

4. The horizontal jet-mechanical combined rock breaking test device according to claim 1 , wherein the measuring component further comprises a three-directional force sensor and a pressure monitoring sensor, the three-directional force sensor is provided on the cutter holder to monitor a stress on a rock breaking cutter in a process of breaking the target object, and the pressure sensor is provided between a jet nozzle and a jet liquid supply mechanism to monitor a jet output pressure.

5. The horizontal jet-mechanical combined rock breaking test device according to claim 1 , wherein the surrounding rock stress simulation bin comprises a bin body outer frame, pressurizing oil cylinders and a backing plate, the bin body outer frame provides reaction force for the pressurizing oil cylinders, and the pressurizing oil cylinders are provided in three side surfaces of the bin body outer frame to apply a pressure to the backing plate which transfers the pressure to the rock sample to realize three-directional stress state simulation of the rock sample.

6. The horizontal jet-mechanical combined rock breaking test device according to claim 1 , wherein the reaction frame comprises a cross beam, a front reaction plate, a rear reaction plate, a bottom seat, advancement guide rails and a rock bin guide rail, wherein the cross beam and the bottom seat are arranged in parallel, upper and lower sides of the front reaction plate and the rear reaction plate are respectively connected to two ends of the cross beam and the bottom seat to form a frame structure, the advancement guide rails are provided on both the cross beam and the bottom seat to guide the multi-mode cutter head to move horizontally, and the rock bin guide rail is provided on the bottom seat and is slidably connected to the surrounding rock stress simulation bin.

7. The horizontal jet-mechanical combined rock breaking test device according to claim 6 , wherein the driving mechanism comprises advancement oil cylinders, a force transfer plate, a force transfer cylinder, a driving motor, a gearbox and a bearing, there are a plurality of advancement oil cylinders, which are mounted on the rear reaction plate of the reaction frame, a piston rod of each advancement oil cylinder is hinged to the force transfer plate, an end portion of the force transfer plate is slidably connected to an advancement guide rail, the force transfer plate is fixedly connected to the force transfer cylinder, the driving motor and an outer race of the bearing are fixed to the force transfer plate, an inner race of the bearing is connected to the multi-mode cutter head, and the driving motor is connected to the inner race of the bearing through the gearbox.

8. A working method of the horizontal jet-mechanical combined rock breaking test device according to claim 1 , comprising: adjusting the relative positions and quantity of the jet nozzles and mechanical cutters of the jet-mechanical combined cutters, a jet target distance or/and jet angle to form basic loading combinations of jet and mechanical cutters; adjusting mounting positions of multiple combined cutters with the same/different loading combinations on the multi-mode cutter head to form a cutter head with a specific loading mode and loading combination; and driving the multi-mode cutter head to move and rotate horizontally along the reaction frame, so that the jet-mechanical combined cutters are capable of acting on the rock sample in the surrounding rock stress simulation bin for a tunneling test.

9. A working method of the horizontal jet-mechanical combined rock breaking test device according to claim 2 , comprising: adjusting the relative positions and quantity of the jet nozzles and mechanical cutters of the jet-mechanical combined cutters, a jet target distance or/and jet angle to form basic loading combinations of jet and mechanical cutters; adjusting mounting positions of multiple combined cutters with the same/different loading combinations on the multi-mode cutter head to form a cutter head with a specific loading mode and loading combination; and driving the multi-mode cutter head to move and rotate horizontally along the reaction frame, so that the jet-mechanical combined cutters are capable of acting on the rock sample in the surrounding rock stress simulation bin for a tunneling test.

10. A working method of the horizontal jet-mechanical combined rock breaking test device according to claim 3 , comprising: adjusting the relative positions and quantity of the jet nozzles and mechanical cutters of the jet-mechanical combined cutters, a jet target distance or/and jet angle to form basic loading combinations of jet and mechanical cutters; adjusting mounting positions of multiple combined cutters with the same/different loading combinations on the multi-mode cutter head to form a cutter head with a specific loading mode and loading combination; and driving the multi-mode cutter head to move and rotate horizontally along the reaction frame, so that the jet-mechanical combined cutters are capable of acting on the rock sample

Assignees

• Univ Shandong

Inventors

• Liu Bin
• Zhang Bo
• Zhu Hongtao
• Hu Mengmeng
• Li Biao
• Wang Hanpeng
• Lin Chunjin

Classifications

• G01N3/567 Primary

  by submitting the specimen to the action of a fluid or of a fluidised material, e.g. cavitation, jet abrasion (G01N3/565 takes precedence) · CPC title

• G01N2203/0026

  Combination of several types of applied forces · CPC title

• G01N2203/0067

  Fracture or rupture · CPC title

• G01N3/00 Primary

  Investigating strength properties of solid materials by application of mechanical stress · CPC title

• G01M99/008

  by doing functionality tests · CPC title